Should I invest money with the suggestion of that guy? He told me that if I invest I will get good profit. He said, he will open my bitcoin wallet and help to buy bitcoins. Should I invest in bitcoin?
Generally, investing in bitcoin is indeed profitable, but it all depends on your current financial situation and how patient you are.
First, you have to be financial stable in the sense that, after investing, you can just forget about that money invested in bitcoin for atleast, a year or more depending on the season that we are in.
Not being good financially may mean that, you may end up not allowing your investment to proper grow before Harvesting it.
And also good to know is that, you should not trust anybody to set up an account of any kind for you, and neither a wallet, you are here on this forum already, here, you can learn to do all this things your self, and when you do, keep your keys safe, do not leave your bitcoin on the centralized exchange where you bought it, it's very risky to do so, withdraw your bitcoins to your private wallet and make sure to keep the keys to your wallet safe, losing the keys simply means, losing your bitcoins.
Good luck from here.